Claude caught a vendor charging me twice (I will not promote)

Running a startup at about $18k MRR paying roughly 15 different tools monthly. Expense tracking was always that end of month scramble where I export everything into a spreadsheet and reconcile before sending to my accountant Last week my AI setup flagged a monitoring tool that billed us $1,200 twice in the same cycle. Duplicate charge sitting there for 2 weeks and vendor confirmed their error and refunded it It wasnt the $1,200 but it was realizing how many months ive been doing manual reconciliation and ho